CacheDependency.php
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CacheDependency.php
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	<?php
	/**
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License as published by
	* the Free Software Foundation; either version 2 of the License, or
	* (at your option) any later version.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU General Public License for more details.
	*
	* You should have received a copy of the GNU General Public License along
	* with this program; if not, write to the Free Software Foundation, Inc.,
	* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
	* http://www.gnu.org/copyleft/gpl.html
	*
	* @file
	*/

	/**
	* Base class to represent dependencies for LocalisationCache entries.
	*
	* @stable to extend
	* @ingroup Language
	*/
	abstract class CacheDependency {
	/**
	* Returns true if the dependency is expired, false otherwise
	*
	* @return bool
	*/
	abstract public function isExpired();

	/**
	* Hook to perform any expensive pre-serialize loading of dependency values.
	* @stable to override
	*/
	public function loadDependencyValues() {
	}
	}